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Resources for Stellar Atmospheres & Spectra

Resources for Stellar Atmospheres & Spectra. ATLAS Cool stars Hot stars Spectral Libraries. ATLAS – Robert Kurucz.

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Resources for Stellar Atmospheres & Spectra

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  1. Resources forStellar Atmospheres & Spectra ATLAS Cool starsHot starsSpectral Libraries

  2. ATLAS – Robert Kurucz • Available on-line athttp://kurucz.cfa.harvard.edu/A = tables of temperature-pressure relations for each model for a range Teff and log gravity B = Balmer line profiles for each model F = fluxes for each model I = intensities for each model; limb darkening for 17 angles • Linux source code athttp://wwwuser.oat.ts.astro.it/castelli/ • Good for B through G spectral classes

  3. High Resolution Spectra from ATLAS • Bertone et al. 2008, A&A, 485, 823 http://www.inaoep.mx/~modelos/bluered/bluered.html

  4. Useful Links • Simon Jeffery’s site (software, He models)http://www.arm.ac.uk/~csj/software_store/ • Intensive grid: NEMO = Vienna New Model Grid of Stellar Atmosphereshttp://www.univie.ac.at/nemo/cgi-bin/dive.cgi • Richard Gray’s SPECTRUM synthesis program – solves radiative transfer for input model atmosphere (runs on PC, Windows)http://www1.appstate.edu/dept/physics/spectrum/spectrum.html

  5. MARCS - Gustafsson • Gustafsson et al. 2008, A&A, 486, 951 • Models available athttp://marcs.astro.uu.se/ • spherically-symmetric models, using up-to-date atomic and molecular data • Good for Teff between 2500 and 8000K

  6. PHOENIX - Hauschildt • General spherical code with non-LTE models for many atoms, molecules • Used for cool stars (work in progress), substellar objects (condensates), novae, supernovae • Developing spectra for GAIA mission (Teff = 2000 – 50000 K) • Web site at: http://www.hs.uni-hamburg.de/EN/For/ThA/phoenix/index.html

  7. TLUSTY – Lanz & Hubeny • Good for hot stars (B- and O-types) • Uses non-LTE treatment of many atoms • Plane parallel atmospheres, no treatment of stellar winds and mass loss • Accretion disk atmospheres • Web site athttp://nova.astro.umd.edu/index.html

  8. CMFGEN - Hillier • Radiative transfer code designed to solve the radiative transfer and statistical equilibrium equations in spherical geometry • Designed for W-R stars, O stars, and Luminous Blue-Variables • Some spectra available at http://pollux.graal.univ-montp2.fr/ • Web site at http://kookaburra.phyast.pitt.edu/hillier/web/CMFGEN.htm

  9. FASTWIND - Puls • Spherical, non-LTE, line blanketed code that treats photosphere and wind • Good for hot, luminous O-stars • Puls et al. 2005, A&A, 435, 669 • No grid available yet (Lefever et al. 2007, A&A, 463,1093)

  10. Observational Spectral Libraries • Good lists (UV, optical, IR) available athttp://pendientedemigracion.ucm.es/info/Astrof/invest/actividad/spectra.html • Examples: ELODIE (OHP) library for high dispersion R=42000 of northern sky stars • Archive contains nearly 35,000 spectra • Web site at http://atlas.obs-hp.fr/elodie/

  11. Observational Spectral Libraries • Indo-US library of coude feed stellar spectraValdes et al. 2004, ApJS, 152, 251http://vizier.u-strasbg.fr/viz-bin/VizieR-3Select:J/ApJS/152/251

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